Speed Converter
km/h, mph, m/s, knots and ft/s at a glance. Convert speed units instantly: kilometres per hour, miles per hour, metres per second, knots and feet per second. Free speed converter for driving, running and aviation.
About the Speed Converter
Car speedometers read km/h or mph depending on the country, physics uses m/s, aviation uses knots, and ballistics uses ft/s. This converter covers all five from one input: type a value, pick its unit, and every other unit appears instantly — 100 km/h is 62.14 mph, 27.78 m/s and about 54 knots. Handy for driving abroad, reading research papers and decoding weather reports.
How to use the Speed Converter
- Enter your speed value.
- Choose the unit it is in.
- Read all other speed units instantly.
- Swap units to reverse the conversion.
Key features
- km/h, mph, m/s, knots and ft/s
- Instant full table from one input
- Exact conversion factors
- Swap button for quick reversal
How fast is 100 km/h in mph?
Why do planes use knots?
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